Hi Marta
Thanks for your question. Adding to the answers that Sharon and Maria have given, I would definitely recommend keeping a food diary and getting the help of a nutritionist to go through it with you so they can pinpoint any foods that may be hindering weight loss. There is so much information about which foods and drinks are healthy but some of these items may not be healthy or they may not be healthy for you, as we are all individuals with different health needs. It is also important, as Sharon said, to eat enough calories for your metabolism and eat the right kind of calories such as lean proteins, healthy complex carbohydrates such as quinoa, vegetables, less sweet fruit and healthy fats such as avocado, olive oil, nuts, seeds, oily fish. If you do all of these things and still struggle to lose weight then it would be worth having some tests to check thyroid and hormonal function. You may also benefit from doing something like the daily fast, where you eat the same number of calories but between 12pm and 8pm, or the 5:2 where you eat 500 calories on two non-consecutive days of the week. Both of these can be useful methods to lose weight and can also provide other health benefits such as lowering cholesterol and blood sugar levels.
I hope this helps